• ocean acoustics
• signal detection and estimation
• inverse problems

The research of Zoi-Heleni Michalopoulou focuses on inverse problems in underwater acoustics. Currently, new global optimization approaches based on the tabu methodology are being developed for matched-field source localization and geoacoustic inversion. Also, arrival time and amplitude estimation in uncertain environments is pursued via a novel Gibbs sampling scheme.

• Michalopoulou and Ma, Source localization in the Haro Strait Primer Experiment using arrival information and linearization, Journal of the Acoustical Society of America, November 2005.
• Michalopoulou and Picarelli, Gibbs sampling for time delay and amplitude estimation in underwater acoustics, Journal of the Acoustical Society of America, February 2005.
• Michalopoulou and Ghosh-Dastidar, Tabu optimization for matched-field source localization and geoacoustic inversion, Journal of the Acoustical Society of America, vol. 115 (1), pp. 135-145, January 2004.
• Michalopoulou, Estimating the impulse response of the ocean: correlation vs. deconvolution, Inverse Problems in Underwater Acoustics, M. Taroudakis and G Makrakis, Editors, Springer Verlag, 2001
• Michalopoulou, Matched-impulse response processing for shallow water localization and geoacoustic inversion, Journal of the Acoustical Society of America, Nov. 2000.
• Michalopoulou, "Robust multi-tonal inversion: a coherent approach," Journal of the Acoustical Society of America, July 1998
• Michalopoulou and Alexandrou, "Bayesian modeling of acoustic signals for seafloor identification," Journal of the Acoustical Society of America, January 1996